Kurukshetra University 2007 A.M.I.E.T.E Information Technology Chemistry - exam paper

Q -2 provide reasons for the subsequent. [10]

i) Solid lead blomide is a poor calculator of electricity but in the molten state conducts electricity.

ii) It is dangerous to stand in a garage which is closed and has a car engine
running.

iii) Alcohols are called hydroxy derivatives of alkanes.

iv) During electroplating of an article with a superior metal the article is
always kept at the cathode.

v) Crude gold is purified by addition of conc.hydric acid to it but crude copper
is not purified by the identical method.

vi) Addition of sodium to menthol serves us a test for alcohol in general.

vii) Acetylene is comparatively more reactive than ethylene

viii) Sulphur dioxide gaseous pollutant does not completely exit in the gaseous form for prolonged
period of time in the atmosphere.

ix) Chlorine water stored in ordinary glass bottle indicates valuation of bubbles but the identical is not
seen in a dark glass bottle.

x) Roasting is generally carried out on sulphidores.

Q-3 a) Classify the subsequent as saturated and unsaturated hydrocarbons.[10]

C3H4, C4H10, C2H5, C4H8, C7H16, C2H4, C10H22.


Q- four discuss briefly. [10]

1. In the reduction of zinc oxide to zinc in the fire-clay retorts the temperature of the furnace is maintained by external heating.
2. Solder is used in fuse wire.
3. Copper is added to gold for making jewelry.
4. Limestone is added to blast furnace in the extracting of iron from its
roasted ore.
5. The slag formed in the blast furnace is a useful waste.

Q-5 I ) discuss the role of carbon dioxide in the green house effect. [2]

ii) State the role of the subsequent bacteria in the soil. [6]

a) Ammonifying bacteria
b) Denitrifying bacteria
c) Nitrosofying bacteria

iii) Ammonium hydroxide can be used to distinguish ranging from Zn++ and Pb++ but sodium hydroxide can not be used. discuss. [2]

Q -6 select the accurate option and provide a cause for your option. [10]

1. The subsequent loses weight when left exposed to air.
a. MgCl2 . 6H2O
b. CaCl2 . 6H2O
c. Cu (NO3)2.3H2O
d. Na2SO4 .10H2O
e. None

2. Hydrolysis will provide an acid reaction when water is added to -
a. Na2 SO4
b. K2SO4
c. NaNO3
d. Cu(NO3)2
e. None

3. A salt derived from a strong based and a weak acid will provide a salt that is
a. Acidic
b. Boric
c. Neutral
d. Volatile
e. None

4. Potassium hydroxide can react with

a. NAOH
b. Ca(OH)2
c. Zn(OH)2
d. Mg(OH)2
e. None

5. An acid can react with

a. Agcl
b. BaCO3
c. PbSO4
d. Na2SO4
e. None


Q -7 I )State 2 differences ranging from the subsequent . [4]

a. Electroplating and electrorefining
b. Electrolysis of aqueous copper sulphate using platinum electrodes and electrolysis of aqueous copper sulphate using copper electrodes.

ii) describe or discuss the meaning of the subsequent terms. [4]

a. Acid
b. PH scale
c. Catalyst
d. Electrolysis

iii) How much energy in joules must be needed to convert all the atoms of sodium
to sodium ions current in 2-3 mg of sodium vapours ? Ionisation energy of
sodium is 495 KJ mol-1 [2]

Earning:   Approval pending.